Thin Film Transistor Substrate with Mixed Semiconductor Materials

The patent applies different semiconductor material types in different functional regions: oxide semiconductor material (IGZO) is used specifically in the switching transistor channel region where low off-state current is critical, while other transistors may use conventional semiconductor materials. This localized application of specialized materials optimizes power consumption in the most critical area without compromising overall display performance

The patent employs a composite semiconductor material strategy by integrating oxide semiconductor layers (such as IGZO) with conventional semiconductor structures. The oxide semiconductor layer is deposited over specific regions of the substrate to form switching transistors with superior electrical characteristics, creating a hybrid device architecture that combines the advantages of different material systems to achieve both low power consumption and high performance

The patent implements local quality by assigning different semiconductor material types to different functional requirements: oxide semiconductor material is specifically applied to switching transistor channels where low leakage current is paramount, while driver transistors may use conventional materials optimized for high current drive capability. This spatial differentiation of material properties enables simultaneous optimization of both switching and driving functions

The patent segments the substrate into distinct functional regions with different transistor types. Switching transistors are formed with oxide semiconductor channels in specific pixel regions, while driver transistors in peripheral or control regions may use conventional semiconductor materials. This segmentation allows independent optimization of each transistor type for its specific function while maintaining a unified manufacturing process framework

The patent applies oxide semiconductor material specifically to the channel region of switching transistors where low off-state current is critical, while maintaining polycrystalline semiconductor material in driver transistor regions where high current drive capability is needed. This localized material selection enables each transistor type to exhibit its optimal electrical characteristics for its specific function

The patent creates a composite transistor architecture where oxide semiconductor layers are integrated with polycrystalline semiconductor structures. The oxide semiconductor channel provides excellent off-state characteristics, while the overall transistor design maintains high on-state current capability, achieving a composite effect that combines the advantages of both material systems

The patent restricts oxide semiconductor material application to switching transistor channel regions where low off-state current is the primary requirement, while driver transistors use polycrystalline semiconductor material optimized for high current drive capability. This functional zonation ensures each material type operates in its optimal performance regime

The patent segments the display substrate into switching transistor regions with oxide semiconductor channels and driver transistor regions with polycrystalline semiconductor channels. This segmentation allows the oxide semiconductor to excel at leakage suppression in switching elements while polycrystalline materials provide robust current driving in control elements, with each segment independently optimized for its specific function